San Elizario, TX 79849 Frost Dates
79849, near San Elizario, TX: the frost window
Typically, the last spring freeze lands around 03/21, roughly 205 days out. Fall's first freeze usually shows up around 11/06, roughly 227 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts San Elizario in Zone 8b (15 to 20°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
San Elizario's growing season runs out in roughly 10 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
How much risk comes with planting early here
03/21 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/05 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/09 and only about 1 year in 10 sees frost after that.
San Elizario against the rest of the dataset
At roughly 227 frost-free days, San Elizario places 10,998 of 40,283 ZIP codes in this dataset. Within TX, it ranks 2,213 of 2,558.
Learn more
Two guides worth reading on 79849: zone vs. frost date, on why Zone 8b and San Elizario's frost date answer different questions, and the frost range, on how to read the range around San Elizario's dates instead of trusting one.